Rowing device



F. ZOGLAUER ROWING DEVICE Filed Feb.

May 19, 1931.

Patented' May 19, 1931 FERDINAND ZOGLAUER, OF PETERSWALDS, NEAR ORLAU, CZE(JI-IOSLOVAKIA nowiive DEVICE Application-filed February 7, 1930. ,Serial 41\T0.;42(,722.`

l My invention relates to new yand useful improvements in rowing devices, and'has for its object the provision of a device in combination with the oar of a boat which is 5 adaptedA for imparting a higher speed to the boat or for stopping it in a shorterV time than heretofore. ln addition to this, the invention comprises means embodying certain other novel features of construction, com- 10 bination and arrangements of parts substantially as disclosed herein and as illustrated in the accompanying drawings, in Which:

Figure 1 is aside elevation of the complete devicewith the striking blades in operative 15 position,

Figure 2 is a detached view of the oarswivel, and v Figure 3 is a side elevation of the lower portion of the device with the striking blades in inoperative position, and 5 l v Figure l is a vertical sectional view as indicatedby the line A--B of Figure 3.

ln the drawings, the numeral a designates the oar proper which is arranged within a steel tube b of the shape shown, supported therein by suitable bearings and adapted to be displaced in axial direction. The upper poi-tion of the loom is provided with a spiraly Y ,A Y v 'surface andto present tothe waterk this large spring @bearing on-the one hand against a knob d forming top of the loom and somewhat upstanding from the end of the steel tube, and on the -other hand'against the bearing flange e of the tube, the said spring having thel tendency of constantly holding the oar in its normal position. A handle preferably made of ebonite, vis fixed to the upper extremity of the loom, but loosely mounted on ythe tubel shaft.

The lower portion'of the steel tube is pro'- vided with a longitudinally extending slot g rather broadly diinensioned and allowing the passage of two large striking preferably the loom close and in parallel directionto each other. capable ofswinging about their hinges,

edgings of the slot g vdevice ,for the bladesk.V vt lThe described device in combination ,with i 'Spiralisilrms G their y yallel toeach other, in which position they are A =dividing the watereasilyy and with onlya f W hen it lthe boat, or to turn round sharply, the rower f yspe'etiveoar so as to cause the one loom to'be vdisplaced axially and the front edges of the f 71, to enter the slot z' in'which the said Y shaft so that the said v y blades remainA as long as thelrnob d isheld4 handle may be capable of slidingon thesaid The said blades are therefore and` the arrangement is so made that the two metal form a stop for the blades when their openor operative position.` f i Toward the lower extremity of the steel first mentioned slot and allowing va partialv entering of -`the front edges of the blades tiibe,the)mslot g is .followed by another slot a' tbeing ofinuch smaller dimensions than vthe When'the oaris being displaced axially, they said slot serving thereforeas a `retaining the oar proper is carried by an oarswiv'elc in the vusual manner. f y In operation: In the normal position, the

holds the blades h out of enwith the slot i and rowing may be" effected as usual. However, owing to the new arrangement, each stroke ofthe oar results first in an,v inoperative action by the two lgageinent striking'blades swinging-automatically about hinges so as'l to become positioned parslightvresistanceysecondly, in the operative action proper ink whichthe two blades,l under directiony so as .to form one continuouslarge surface,lrealizing thereby an oar stroke of maximum powerandl imparting to the boatv a much higher speed than hf-aretofore..`

presses byhand down the lnob'd kof the 'reblades pressed down. As soon as the turned boat is about to continue its course, the rower [ceases the-pressure exerted on the lmob, and tlie loomunder the action of the spring,' blades' 7L made of sheet steel and hinged to is brought baclrto its initial position, withdrawing atthe same time the `blades h from the slot y v n f i YThe operating mechanism which embodies the ,essentialy features described, is so designedy as to be applicable to boats and sculls of any '100 .eor

--the pressure of the column of water, are again swinging about their hinges, but in reverse is'desired to change the course of v in connection with the lower end of the said loom.

2. In arowing device of the character described, the combinationwith an oar, a steel tube having at its lower end a longitudinal slot and within which the said oar is slidably arranged a bearing liange on said tube, means for supporting the loom of the oar, an oarswivel for supporting the loom, a knob fixed on the upper end of the loom projecting from the upper end of said steel tube, a spiral spring' arranged round the loom and bearing against said knob and against' said bearing iiange of said tube, a handle xed to said knob and loosely surrounding said steel tube, and adapted to be displaced in axialfdireetion together with the loom, striking` blades adapted to pass through the longitudinal slot in said tube, hinges ineonnection with the said striking blades and with the loom of said oar and about which said blades are adapted to swing, andedgings on each side of the slots in said tube adapted to form a stop for said striking vblades in their operative position.

3. In a rowing device of the character described, the combination with an oar, a steel tube having at its lower end a longitudinal slot with an extension of smaller dimensions and within which the loom of the oar is slidably arranged a bearing flange on said tube, means for holding the said loom within said steel tube, an oar-swivel :for supporting the loom, a knob fixed to the upperend of said loom and upstanding from the upper end of said steel tube, a spiral spring arranged round the loom of said oar and bearing against said knob and against said bearing flange of said tube, said spring having the tendency of constantly holding saidoar in its normal position, a handle fixed to said knob and loosely surrounding said steel tube, and adapted to be displacedin axial direction together with the loom, striking blades of said oar, hinges in connection with said striking blades and with the loom of said oar and about which said striking blades are adapted to swing, i edgings on the longitudinal slots of said tube adapted to form a stop for said striking blades in their operative position, the front portions of said striking blades being adapted to engageand be held in position in the narrow extension of the slot in said tube, when said knob is depressed by hand, saidoar being displaced axially, and on the pressure on said rknob causing 'said striking blades to be Withdrawn from the narrow extension of the slot insaid tube and the rowing device to be brought back to its initial position, under the action of said spring. v

In testimony whereof I have affixed my signature. l

FERDINAND ZOGLAUER.

VllO 

